Operating basics
Table 2: Rear panel connectors (cont.)
Item
Connector
Description
7
ANALOG MOD IN
External analog modulation is applied to this input. The input impedance is 100 k
Ω
with
a selectable input coupling of either DC or AC (4 Hz roll off). For analog modulations
(AM, FM,
Φ
M), a signal of ±1 V will produce a full scale modulation of the output (depth
for AM or deviation for FM and
Φ
M). It supports bandwidths of 100 kHz and introduces
distortions of less than –50 dB. For Pulse modulation types, this input is used as a
discriminator that has a
fi
xed threshold of +1 V.
8
TIMEBASE OUT
(10 MHz 2 V
pp
)
The instrument also provides a 10 MHz output for referencing other instrumentation
to the internal timebase.
9
TIMEBASE IN (10 MHz
0.5 to 3.0 V
pp
)
This input accepts an external 10 MHz reference. The external reference should be
accurate to at least 2 ppm, and provide a signal of no less than 0.5 V
PP
while driving
a 50
Ω
impedance. The instrument automatically detects the presence of an external
reference and locks to it, if possible. If the unit is able to lock to the reference, this is
indicated on the front panel display.
10
LAN
The Ethernet uses a standard RJ-45 connector to connect to a local area network (LAN)
using standard Category-5 or Category-6 cable. It supports both 10 and 100 Base-T
Ethernet connection and a variety of TCP/IP con
fi
guration methods.
11
RS-232
The RS-232 port uses a standard 9 pin, female, subminiature-D connector. It is
con
fi
gured as a DCE and supports baud rates from 4.8 kb/s to 115 kb/s. The remaining
communication parameters are
fi
xed at 8 Data bits, 1 Stop bit, No Parity, with RTS/CTS
con
fi
gured to support Hardware Flow Control.
12
GPIB
The GPIB (IEEE-488) communications port is for communications over a GPIB bus. The
instruments support the IEEE-488.1 (1978) interface standard. It also supports the
required common commands of the IEEE-488.2 (1987) standard.
NOTE.
When EXT is selected as the Source, the instrument will look for an
external 10 MHz reference at the timebase input BNC. If detected, the instrument
will attempt to lock its internal clock to the external reference.
14
TSG4100A Series RF Signal Generators User Manual
